前川工業所 List of Products and Services

The compact unit-type crusher "Choi Waru no Joe" is easy to install and relocate in a space-saving manner. It allows for precise material supply and is equipped with a sensor at the feed chute that automatically stops the machine in case of a blockage. Even beginners can operate it easily, and it can be used outdoors or at construction sites. Additionally, with the optional feeding table, foreign objects and fine particles can be removed in advance, improving crushing efficiency and extending the lifespan of the crusher. 【Features】 ■ Integration of feeding, crushing, and discharging in one unit ■ Easy installation and relocation in a space-saving design ■ Transportable by arm roll trucks ~ We will be exhibiting at the 2023 New Environmental Exhibition! ~ Dates: May 24 (Wed) - May 26 (Fri), 2023 Hours: 10 AM - 5 PM (until 4 PM on the last day) Venue: Tokyo Big Sight Booth: A351 Exhibited products: Jaw crusher, dual-axis roll crusher, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Woodworking machines, instruments, and tools

From raw material crushing for mines, cement plants, steelworks, and chemical plants to primary crushing of various materials in the environmental recycling sector, our equipment is widely used. Its structure and usage are easy, and the robust design and high performance unique to Maekawa have been recognized, with over 1,700 units delivered to date, yet we continue to receive numerous inquiries from customers. For example, do you have any of the following concerns regarding crushers and grinders? "I want a sturdy crusher." "Is there a jaw crusher with contamination countermeasures?" "The manufacturer of our existing crusher has gone out of business, and I can't procure parts." The crushers and grinders handled by Maekawa Engineering have a wealth of delivery records nationwide. Even tasks that are difficult with standard machinery, Maekawa Engineering can propose appropriate solutions. *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

From raw material crushing for mines, cement plants, steelworks, and chemical factories, it is widely used as primary crushing for various materials in the environmental recycling field. The structure and usage are easy, and the unique robust structure and high performance of Maekawa have been recognized, with over 1,700 units delivered to date, yet we still receive numerous inquiries from customers. For example, do you have any concerns regarding crushers or grinders such as: "I want a sturdy crusher." "I need a compact jaw crusher of small to medium size (for processing capacity of less than 5 tons/day)." "Is there a jaw crusher that can crush finely?" The crushers and grinders handled by Maekawa Industrial have a wealth of delivery records nationwide. Even tasks that are difficult with regular machines, Maekawa Industrial will appropriately propose solutions. *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

◎Joke Crusher 【Exhibited Model】 SC-0605 【Features】 ■ High-quality Japanese cast steel is used for the frame ■ Exceptional durability and stable crushing performance, leading to a longer lifespan ■ Smooth operation with low lubricant consumption ■ Easy adjustment of the gap between the tooth plates ■ Over 1,700 units delivered domestically ◎Hammer Crusher 【Exhibited Model】 HCB-1810T 【Features】 ■ High crushing ratio ■ Low equipment cost compared to crushing capacity ■ Granulation adjustment possible with the grating (screen bar) ■ Simple mechanism with fewer breakdowns ■ Easy grating replacement [Patent registered] *Exhibited at the "NEW Environmental Exhibition" in May 2022. *For more details, please download the materials or contact us directly.

• Metal roof tile
• Rock drills, demolition machines, and excavators

We will introduce examples of the use of crushers for gypsum board recycling. They can be used for applications such as separating gypsum attached to paper and crushing gypsum particles (5-10mm) into powder (-3mm). We offer models including the "RBT-1610GS" with a roll size of φ400×250mm, as well as the "RBT-2416G" and "RBT-3024GCS". 【Features】 ■ Low noise, low vibration, low power consumption ■ Adjustable gap between rolls for targeted particle size reduction ■ Compact and robust design for low maintenance *For more details, please refer to the PDF document or feel free to contact us.

• Work tools
• Other resource recycling

"Choi Waru no Joe" is a compact unit-type crusher that can be easily installed and relocated in a space-saving manner. It allows for precise material supply and is equipped with a sensor at the feed chute that automatically stops the machine in case of a blockage. It is easy to operate even for beginners and can be used outdoors at construction sites. Additionally, with the optional feeding table, foreign materials and fine particles can be removed in advance, improving crushing efficiency and extending the lifespan of the crusher. [Features] - Integration of feeding, crushing, and discharging into one unit - Easy installation and relocation in a space-saving design - Transportable by arm roll trucks *For more details, please refer to the PDF document or feel free to contact us.

• Woodworking machines, instruments, and tools
• Waste treatment facility

The SG-10 is a sample grinder that supplies crushed material between the mantle and the cone cave, performing continuous crushing through the rotation of the mantle. The particle size after crushing can be adjusted to below 1mm. Adjustments can be easily made using a handle. It is suitable for fine grinding various raw materials such as ores, limestone, coal, and coke. 【Features】 ■ Capable of crushing to below 1mm ■ Particle size after crushing can be adjusted with a handle ■ Simple structure with excellent durability ■ Easy inspection and maintenance ■ Cleaning and maintenance of the crushing area are easy by lifting the cone cave *For more details, please refer to the documentation. ★ We are currently accepting crushing tests for this product and roll breakers! Please feel free to apply through the inquiry form.

• Work tools

The Maekawa "Hammer Crusher," boasting 70 years of achievements and experience, is active in industries dealing with hard materials such as various types of glass and ceramics, as well as soft materials like coal and coke. Furthermore, we offer a diverse lineup that can accommodate both hard and soft raw materials! 【Features】 ■ High crushing ratio ■ Low equipment cost compared to crushing capacity ■ Particle size can be adjusted using the grates (screen bars) ■ Easy grate replacement (patented!) 【Application Results】 ■ Various types of glass ■ Incineration ash melting slag, incineration residues ■ Ceramics and pottery ■ Rocks, gravel, ores, abrasives, etc. ■ Ferrous alloys, rare metals ■ Coal, coke, limestone ■ Carbon, chemical raw materials ■ Bricks, gypsum boards ★ Test machines are available for loan. Please take this opportunity to try it out. 【We will exhibit at the 30th 2021 NEW Environmental Exhibition】 Venue: Tokyo Big Sight Dates: March 17 (Wednesday) to March 19 (Friday) Booth Number: West 1-034

• Work tools

This is a small two-axis roll-type crusher suitable for breaking down large blocks. It can be used for primary crushing of large raw materials and pre-treatment for recycling various products, allowing for the crushing and breaking of a wide range of materials. 【Features】 - Particle size can be adjusted after crushing by changing the roll gap. - All cutting edges are treated for wear resistance. - The machine has a low height, making it convenient to connect with upstream and downstream processing systems. - The low-speed crushing method minimizes noise and vibration. - Simple structure that requires low maintenance. 【Crushing Test Information】 We also conduct crushing tests and have more than 10 testing machines available, including roll breakers, jaw crushers, hammer crushers, small tooth crushers, small grinders, and vibrating feeders with hoppers! *For more details, please refer to the PDF or feel free to contact us.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Aggregate Production Machine

Our company is a specialized manufacturer of crushers and grinders, established in 1946. We design, manufacture, and sell various types of crushers, as well as design and construct various powder plants! All used machines we handle are disassembled, maintained, and tested before sale! *(6-month warranty) Please understand that we may run out of stock. Additionally, we only accept trade-ins and purchases of used machines that are our own products as a general rule. 【Examples of Used Machines for Sale】 ■ Fine Jaw Crusher SCL-2415 (for 37kw) ■ Fine Jaw Crusher SC-1610 (for 15kw) ■ Fine Jaw Crusher SW-3608 (for 37kw) ■ Fine Jaw Crusher SC-1007 (for 7.5kw) *The available products may change depending on the time. For more details, please contact us.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Aggregate Production Machine

This is a small two-axis roll-type crusher suitable for breaking down large chunks. It can be used for primary crushing of large raw materials and pre-processing for recycling various products, allowing for the crushing and breaking of a wide range of materials. 【Features】 - Particle size can be adjusted after crushing by changing the roll gap. - All cutting edges are treated for wear resistance. - The machine has a low height, making it convenient to connect with processing systems in front and back. - The low-speed crushing method minimizes noise and vibration. - Simple structure that requires low maintenance. *For more details, please refer to the PDF document or feel free to contact us.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Aggregate Production Machine

The "Single Roll Crusher" from Maekawa Manufacturing is a crushing machine designed to crush materials by feeding them between a roll with protrusions and a receiving tooth. It is widely used for crushing relatively soft materials such as coal, coke, and incineration ash, allowing for the reduction of large chunks into smaller pieces in a single crushing operation. The structure is simple, achieving excellent durability and safe operation. In the event of foreign material intrusion or overload, springs activate to prevent damage. 【Features】 ■ Capable of crushing large chunks with a single unit ■ Suitable for crushing relatively soft materials ■ Can easily crush materials with some stickiness ■ Simple structure with outstanding durability ■ Easy maintenance, inspection, and upkeep *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

Maekawa Industrial's "Hammer Crusher" is active in a wide range of fields, handling everything from hard materials like various types of glass and ceramics to soft materials such as coal and lignite. With a diverse lineup that can accommodate both hard and soft raw materials, along with a robust design backed by proven results and experience, it has received high praise under the harsh usage conditions of various industries. ★ Test machines are available for rent. (70,000 yen/day) Please take this opportunity to try it out. 【Features】 ■ High crushing ratio ■ Low equipment cost compared to crushing capacity ■ Granularity can be adjusted with the grates (screen bars) ■ Easy grate replacement (patented!) * For more details, please download the catalog or feel free to contact us.

• Work tools

Maekawa Industrial Co., Ltd. has been challenging itself to create reliable products since its establishment in 1946 as a specialized manufacturer of crushers and grinders. Starting with machinery for mining, we have received high praise across a wide range of industries, including crushing machines for crushed stone, glass, various ores, coal, and coke, as well as in power generation, steelmaking, ceramics, and environmental fields. You can trust Maekawa Industrial Co., Ltd. for "trust" based on experience and achievements, and "high technology" backed by patents, for various crushers and grinders. 【Business Activities】 ■ Manufacturing and sales of complete crushing plants ■ Manufacturing and sales of crushers ■ Manufacturing and sales of vibrating screens ■ Manufacturing, sales, and rental of various industrial machinery ■ Machinery installation work ■ Brokerage and sales of used machinery ■ Crushing and grinding services for various materials ■ Wholesale of machinery and equipment *For more details, please refer to the PDF document or feel free to contact us.

• Aggregates and crushed stone
• Concrete Machinery
• Work tools

This catalog introduces the crushing and grinding products handled by Maekawa Manufacturing in three languages (English, Chinese, and Japanese). Featuring high crushing performance, durability, and reliability, we offer a wide range of products including the "Roll Breaker" and the compact and robust "Small Tooth Roll Crusher." Thanks to the extensive achievements and high technical capabilities cultivated since our establishment, our crushers are actively used worldwide across various industries and for a wide range of raw materials. 【Featured Products】 ■ Roll Breaker (Double Roll Crusher) ■ Small Tooth Roll Crusher ■ Disintegrator ■ Hammer Crusher ■ Jaw Crusher ■ Roll Jaw Crusher *The downloadable PDF material is a digest version. If you would like the complete version, please contact us.

• Aggregates and crushed stone
• Concrete Machinery

The RG-type vibrating screen, commonly referred to as the Gyrex screen, is a vibrating screen that our company has perfected through years of research and experience, and for which we have obtained a patent. In its installed state, the inclination angle can be adjusted from approximately 0 to 25 degrees, and thanks to its robust basic design, it offers excellent durability even in harsh environments. 【Features】 ■ High processing capacity and good screening efficiency ■ Minimal clogging ■ Difficult to transmit vibrations externally ■ Low failure rate ■ Can be used in both forward and reverse rotation ■ The inclination angle of the screen frame can be adjusted while installed ■ Easy replacement of the screen mesh *For more details, please refer to the PDF document or feel free to contact us.

• Aggregates and crushed stone
• Aggregate Production Machine
• Concrete Machinery

This is a small two-axis roll-type crusher suitable for breaking down large lumps. It can be used for primary crushing of large raw materials and as a pre-treatment for recycling various products, allowing for the crushing and breaking of a wide range of materials. 【Features】 - Particle size can be adjusted after crushing by changing the roll gap. - All cutting edges are treated for wear resistance. - The machine has a low height, making it easy to connect with upstream and downstream processing systems. - The low-speed crushing method minimizes noise and vibration. - It has a simple structure that requires low maintenance. *For more details, please feel free to contact us.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Aggregate Production Machine

This is a small jaw crusher with a robust design suitable for crushing hard materials in a laboratory setting. The crushing chamber features a double-hinged structure, making it easy to clean for each type of material. The product particle size can be easily adjusted by the gap between the jaws. 【Features】 ■ Small jaw crusher for laboratory use ■ Particle size after crushing is approximately 2-3 mm ■ Product particle size can be easily adjusted by the gap between the jaws ■ Robust design makes it suitable for crushing hard materials ■ Double-hinged structure allows for easy cleaning for each test material *For more details, please refer to the PDF document or feel free to contact us.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Aggregate Production Machine

Maekawa Manufacturing's crushers and grinders combine high reliability and durability due to their robust structure with excellent crushing performance. We have sold over 1,700 jaw crushers and more than 1,000 roll breakers, and in recent years, our hammer crushers have been particularly active in industries and applications related to environmental recycling. ★ We are currently offering a free catalog that provides an overview of our crushers and grinders, unique to a specialized manufacturer! We also conduct grinding tests and contract grinding. 【Featured Products】 ● Roll Breaker ● Small Tooth Roll Crusher ● Disintegrator ● Hammer Crusher ● Jaw Crusher ● Roll Jaw Crusher * The catalog is available not only in Japanese but also includes descriptions in English and Chinese.

• Aggregates and crushed stone
• Rock drills, demolition machines, and excavators
• Construction machinery leasing and rental

With a robust structure and excellent low maintenance, the unique serrated teeth, which are highly wear-resistant, are used under harsh conditions in various fields. * Staggered serrated tooth structure. Ensures reliable crushing without bypassing the material. * Two serrated tooth rolls are driven in sync. * The serrated tooth rolls are made of cast steel, with all tips subjected to wear-resistant treatment. * Three types of roll gaps are available according to the crushing specifications. * The base frame features a robust structure made of cast iron, demonstrating stable crushing performance and durability even under harsh conditions. * We also have a proven track record of powerful medium and large machines, so please contact us for inquiries.

• Rock drills, demolition machines, and excavators

A two-shaft roll crusher excellent for crushing waste concrete and waste asphalt. * Robust design that withstands harsh use * Simple structure requiring low maintenance * Ensures top size regulation by significantly increasing the number of teeth Download the catalog for detailed specifications and drawings!

• others

The "Joke Crusher" utilizes high-quality Japanese cast steel for its frame and achieves outstanding durability, stable crushing performance, and extended lifespan through its monolithic structure. It operates smoothly, consumes little lubricant, and allows for easy adjustment of the gap between the teeth plates using our patented mechanism. It is widely used for primary crushing of raw materials in mines, cement plants, steel mills, and chemical plants, as well as in various raw materials for environmental recycling. 【Features】 ■ High-quality Japanese cast steel used for the frame ■ Outstanding durability, stable crushing performance, and extended lifespan achieved ■ Smooth operation with low lubricant consumption ■ Easy adjustment of the gap between the teeth plates (patented mechanism) ■ Over 1,700 units delivered domestically *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

Selecting a crusher is often difficult on paper due to factors such as the material to be processed, processing capacity, and usage conditions. Therefore, it is common to conduct actual crushing tests to determine detailed specifications. Our company has various types of crushers available for demonstration, and we accept crushing tests tailored to customer requests. Short-term rentals of various crushers and grinders are possible, ranging from a few days to about two weeks. 《Rental Examples》 ● Roll Breakers: RBT-1610G (wedge type), RBT-1610GS (screw type), RBT-1716G (screw type), RBT-2416G (screw type) ● Fine Jaw Crushers: SC-0605 (for fine crushing), SC-1007, SC-1007 (for fine crushing), SC-1610 ● Small Tooth Roll Crusher: DRG-1210 ● Roll Jaw Crusher: RJ-0503 ● Hammer Crushers: HCB-1810T, HCB-2418T, and many more! *Rental products may vary depending on the season. Please contact us for more details.

• Aggregates and crushed stone
• Other earthworks, foundation works, and exterior floors

The "Roll Breaker" is a crusher that achieves low noise levels through our unique rubber tire drive. The gap adjustment between the rolls can be easily adjusted in increments of 0.1mm, allowing for timely adjustments according to roll wear and changes in the characteristics of the crushed material. Additionally, the cost of consumable parts is extremely low, enabling a reduction in maintenance costs of about 20% compared to conventional impact crushers. 【Features】 ■ Capable of crushing to the desired particle size range ■ Stable product particle size ■ Precise particle size ■ Low cost of consumables ■ Low maintenance ■ Low noise *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools

The "Fine Joke Crusher" is a crushing machine capable of powerful crushing, thanks to its high-rigidity frame made of integrated cast steel. With its single toggle mechanism, it excels in material bite. It can be easily and quickly adjusted using our unique setting adjustment mechanism. It is widely used for primary crushing of raw materials in mines, cement plants, steel mills, and chemical plants, as well as in various raw materials for environmental recycling. 【Features】 ■ Single toggle mechanism ■ High-rigidity frame made of integrated cast steel ■ Capable of powerful crushing ■ Our unique setting adjustment mechanism ■ Standard heavy load bearings (main shaft bearings and bumper bearings) ■ Over 1,700 units delivered domestically *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The roll breaker is a double roll type crusher and grinder that crushes using two rolls. It is widely used for secondary to tertiary crushing of hard materials such as metal silicon, ceramics, alloys, slag, fired products, coal, coke, and concrete waste. Due to its simple structure and extremely high efficiency, it boasts a delivery record of over 1,000 units, making it the top choice in the country. ★ Crushing tests are currently being conducted! Selecting a crusher can often be difficult based on the material to be processed, processing capacity, and usage conditions, so we have various actual machines available for testing. We accept crushing tests upon request to help solve your problems related to "crushing" and "breaking." 【Features】 〇 Compared to conventional impact crushers, maintenance costs can be reduced by about 20%. 〇 By setting the roll gap to 0.5 mm, powders below 1 mm can be produced at low cost. 〇 The crushed product contains little fine powder and can be crushed to the desired particle size. We will be exhibiting at the "25th International Powder Technology Exhibition Tokyo 2024" (1B-18). We look forward to your visit. *For more details, please contact us or download the catalog to view.

• Aggregates and crushed stone

The "Hammer Crusher" is a crushing machine with a simple mechanism and low failure rate. It has a large crushing ratio (the ratio of size before and after crushing) and can achieve the desired particle size by using a grizzly (screen bar). It is widely used in various fields, from hard materials such as glass and ceramics to soft materials like limestone and coal. 【Features】 ■ Large crushing ratio ■ Low equipment cost compared to crushing capacity ■ Particle size adjustment possible with grizzly (screen bar) ■ Simple mechanism with low failure rate ■ Easy grizzly replacement [Patent registered] *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The "MRII-1000" is a double roll crusher with a robust design that can withstand harsh usage. By removing the counter shaft and directly connecting the main shaft and motor with a chain, it features a simple structure that requires minimal maintenance. By significantly increasing the number of teeth, it ensures precise regulation of the top size. 【Features】 ■ Robust design that can withstand harsh usage ■ Simple structure that requires minimal maintenance ■ Ensures precise regulation of the top size by significantly increasing the number of teeth *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

The "Fine Jaw Crusher (Small)" is a crushing machine suitable for the grinding of small quantities of hard materials in a laboratory setting. With its single toggle mechanism, it excels in the biting of raw materials. Thanks to our unique setting adjustment mechanism, it can be easily and quickly adjusted. Being compact, it can be used in laboratories and similar environments. 【Features】 ■ Sturdy small jaw crusher ■ Suitable for grinding small quantities of hard materials ■ Can be used in laboratories, etc. ■ Capable of powerful crushing down to a few millimeters *For more details, please refer to the PDF document or feel free to contact us.

• Work tools

Our company has various types of crusher machines permanently installed, and we accept crushing tests based on customer requests. The main materials for crushing include chemical raw materials, hard materials, alloy steel, and rare metals. Additionally, our crushers are used by a wide range of customers across various industries for different applications. 【Permanent Test Machines】 ■ Roll Breaker ■ Fine Jaw Crusher ■ Small Tooth Roll Crusher ■ Hammer Crusher ■ Small Crusher ■ Single Roll Crusher ■ Electromagnetic Feeder Unit ■ Circular Vibrating Screen *For more details, please refer to the PDF materials or feel free to contact us.

• Work tools